Printing machine



Oct. l, 1,929. l A. s. BusK 1,730,122

PRINTING MACHINE l Filed July 10, 1926 2 Sheets-Sheet, l

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A TTORNEYS c., i, E929n A. s. @USK PRINTNG MACHINE,

Filed July 10 1926 2 @imam-Sheet 2 :waz-W2 INVENTOR.

` ATTORNEKS` Patented oeil i, 1929 insana PATENT HQE ANTHONY S. BUSK, 0F POUGHKEEPSIE, YORK, ASSIGNOR TO HOE CORPORATION, OF POUGHKEEPSIE, NEW YORK, A CORPORATION OF NEW YORK PRINTING MACHINE Application flied July 1o,

.ranged so 4that its edges will be conveniently accessible. and particularly in the case ot a printing plate, so that the plate 'can be adjusted on the cylinder to bringr it in proper printing relation with other plates and other cylinders of the saine press. It is the object of my present invention to provide an arrangement. by which these ends may be accomplished.

Mv invention will be best understood from the following description and the annexed drawings of an illustrative embodiment, in which Fig. 1 is a longitudinal elevation of at'orin cylinder to which my invention has been applied, with a portion ot' the cylinderl removed to better illustrate the construction Fig. 2 is an enlarged section on the line 2-2 ot Fig. 1; Fig. 3 is an enlarged view ot a portion of the cylinder shown in Figs. 1 and 2 looking from above in Figs. 1 and 2 and with portions broken away; Fig. 4 is a sidey elevation, part-ly in section, ot a blanket or impression cylinder embodying one form ot my invention, and Fig. 5 is an end View of the cylinder shown in F ig. 4.

Like reference characters indicate like parts in the several views.

Inthe arrangement shown in Fi gs. 1, 2 and 3, the cylinder is provided with the usual' shaft 10 and is itself made up of two semi'- cylindrical shells, one of which has a sheetsupporting,- portion 11 and the other a sheetsupporting portion 12, each of such portions being somewhat less than 180o in circumferential arc. The shell having the pOrtion 11 is provided with hubs 13, of which there may noted that the bearers 16 and the shell having the portion 11 are in fixed relation because 'of their fixed connection to the shaft 10 and that the shell having the portion 12 may be moved around the axis ofthe cylinder in relation to the bearers and the portion 11. In order to hold the shell having the portion 12 in desired relation to the remainder ot the cylinder, I provide in the illustrative einbodin'ient, a lug 18 on each of the bearers 1G, in which lugsare threaded screws 19 having their lower ends bearing against a. lug 20 connected tothe hub 15 of the shell ha ving the portion 12. Between a. portion of the shell 11 and the lug 2() is.a compression spring 21 which acts against the pressure of the screws 19.

lith the arrangement just described, it will be obvious that when the .screws 19 are turned, they will be moved against the lug. 20 and this, in turn, will move the shell havingr the portion 12 clockwise in F ig. 2. On the other hand, it' the screws-19 are turned in the opposite direction, then the spring 21 will move the shell having the portion 12 counterclockwise.

In the form illustrated in Figs. 1, 2 and 3, the cylinder is designed as a plate cylinder for a planographic printing press in which the plate P extends entirely around the cylinder with its edges held in suitable clamps located respectively at the adjacent y ends 'of the portions 11 and 12. These clamps are substantially alike and a description of one of them Will, therefore, be sufficient.

The end of the portion 11 is provided with' a. recess having a vertical wall 22 and a bottom 28 and in this recess is placed a Yremovable portion 24 with its side and bottoni againstthe side and bottom of the recess in the portion 11, the outer surface of the poran angular projection 25 against which bears a correspondingly angular portion of a plate 26 held to the shell by bolts 27 but arranged in such a way that, while the cooperating angular portions will prevent the portion 24 from moving out radially from the cylinder, it will not prevent motion of the portion 24 longi! tudiiially of the axis of the shaft 10. The plate 26 may be formed continuously across the cylinder or made up of a-number of shortlength plates.

In the portion 24 is a groove having a rectangular portion and also an angular portion at the upper side,v and fitting 1n this,

groove is a body member 28 forming a parti of the plate clamping device, the other por-{ tion of the clamping device being formed by a thin plate 29 through which extend screws 30 threaded into the body member 28 and preferably provided with a spring 31 to move the plate 29 outward 'when the screws 30 are turned to move their heads away from the body member 28. The edge of the plate P is bent and entered between the body member 28 and the plate 29 Jand is held by the pressure derived from the screwing up of the screws 30. The body member 28 is provided withnn upwardly project-ing angular portion 32 entering the corresponding angular portion of the groove in the removable portion 24, this angular portion being provided so that the plate will be held closely adjacent the surface of the cylinder.

The body member 28 is also provided at spaced intervals with a number of screw plugs 33 bearing against the rear wall of the groove in the removable portion 24 and means are provided for rotating these screw plugs, which, in the form illustrated, is a hexagonal member 34 entering a hexagonal central opening in the plug 33, the member 34 having a hexagonal bolt head 85 outside of the plate 29 and a circular portion 36 extending through an opening in t-he plate 29 and provided with a collar 37 pinned to the member 34. Vhen the bolt head 35 is turned, its rotation is com` inunicated through the hexagonal member 34 to the plug 33 and by the rotation of the plug' 3S and its pressure against the rear wall of the groove, the body member 28 will be moved outwardly to draw the plate P over the surface of the supporting portion of the shell with which the particular plate clamp being moved cooperates.

ln each of the bearers 16 is a largeheaded screw 38 having its head bearing against both of the removable portions 24, so that, by turning the screws 38, these removable portions may he moved bodily longitudinally of the ovl i nder.

lt will. understood that. the ends of the shell 'provided with the plate'c-lampsdiave the removable portions 24 are located and,

in order to counterbalance the metal at these ends of the shell, the opposite ends of the portions 11 and 12 are provided with similar proj ections, as shown best in Fig. 2.

It will also be understood that, because of the closeness with which the ends of the por. tions 11 and 12 having the plate clamps may approach each other, openingsmay be vided in each ofthe plates 29 opposite the respective bolt heads, so that these bolt heads may sink into appropriate recesses in the op-` posite plate 29. As shown best in Fig. 3,the v l.,several bolts 30 and the several plugs 33 in the respective plate clamps are arranged in staggered relation across the cylinder, so as not to interfere with each other.

-With the arrangement described, the screws 19 are first manipulated so as to move the portion l2 counter-clockwise in Fig. 2 to close up 'the gap at the bottom and to make the gap at the top as wide as possible. Then plates 29 are opened by unscrewing bolts 3() and the edges of the printing plate P are inserted and the bolts 30 tightened to'grip the edges of theplatesin the respective plate clamps. Then the screws 19 are manipulated to move the portion 12 clockwise to draw the plate tightly around the cylinder. It will be understood that the design on the printing plate will be positioned on the late in proper relation to the bend in the printing plate P and also in relation to the gaps between the portions 11 and 12, so that the margins between the design on the portion 11 and the design on the portion 12 will come opposite the gaps between those supporting portions.

If it is vfound that the plate P needs to .be shifted around the cylinder to bring' it in proper relation to t-he other cylinders in a web printing press, for instance, then the members 35 are turned to rotate the plugs ,33,

plate P, so that' oneside of the plate should.

be shifted without shifting the other, then one set of plugs 33 at one side of the cylinder plate i' can be manipulated to move that side of the plate only. For instance, the plugs '33 at the right-hand end of the cylinder in Fig. 1 will be turned so that that end of one ofthe ineinbers 28 will be free to move further into its groove and the plugs 38 at the same end of the other member 28 will be turned so that that end of that member 28 will be moved out of its groove and, by thus throwing t-he members 28 out of alignment wit-h the axis of the cylinder, one side only of the plate P will be moved.

'It will be understood that any of the motions given to the plate P by moving the members 28 into or out of their respective grooves, though small, will be sufficient to take care of any of the usual inaccuracies in locating the design on the plate P and in locating the plate in proper relation tothe bends in the design.

By providing the plates 26 with their bolts 27 which are accessible between the heads and the heads of the bolts 30, each of the removable portions 24 may be removed from the cylinder in case any repair is necessary to the plugs 33 or the bolts 30, and this may be done without removing the cylinder from the press or dismoiinting the cylinder in any way. It will be obvious that in such case', the bolts 27 need be loosened only enough to permit the plate 26 to move outward away from the angular portion 25 of the removable part 24.

It will also be obvious that with the arrangement described, very much narrower margins may be provided than would otherwise be possible. As illustrated, the margins are so small that it would not'be possible to insert the edges of the plate in the plate clamps if the two portions ll and l2 could not be moved relatively to each other. Moreover, by tightening the plate on the cylinder by moving the two sliells relatively, it is' unnecessary to provide any great circumferential movement for the clamps themselves relatively to the cylinder.

In the arrangement shown in Fig. 4, Il 'have shown mv invention applied to an iinpression or blanket cylinder, the cylinder having a shaft 40 with the relatively fixed shell 41 and the relatively movable shell 42 and with devices similar to those described for the plate cylinder, whereby these shells may be moved relatively to each other. Instead ofthe plate clamps. the cylinder is provided with a pair of'blaiiket rodsi43 to which the blanket B may be attached, as by the plate 44 and the screws 45, the ends of the blanket rods being provided with the usual pawl and ratchet arrangement commonly used for such blanket rods. The bearer 4G has openings opposite the ends of these. blanket rods, so that such ends may project through the bearer to be provided with the usual squares 47 by which the rods may be turned.

ln a manner similar to that previously described for the cylinder shown in Fig. 2, the two shells are moved so as to provide a wide gap at the top of Fig. 5 through which the ends of the blanket. B may be inserted and fastened to the rods bythe plates and screws and 45. Then the shells are moved relatively to produce a substantially equal gap at the top and bottom of Fig. 5 and the blanket may be further tightened by turning the rods 48 in the usual manner.

It will bev understood that many of the features of my invention may be used independently of the other features and that the arrangement which I have shown is merely illustrative and that the embodiment of my invention may be` widely varied.

Iclaimz.. y.

1. A printing, press cylinder comprisingr a pair ofsemi-cylindrical shells, each having a supporting surface with the' sum of the arcs of the two surfaces less than 3600, and means -to move said shells relatively around the axis of the cylinder.

2. A printing press cylinder comprising a pair of semi-cylindrical shells, each having a supporting surface with the sum of the arcsof the two surfaces less than 360, sheetholding means on each shell and each arranged to hold an end of a sheet extending around the cylinder, and means to move said shells relatively around the aXis of the cylinder, whereby the sheet held in said sheetholding means may be stretched.

3. A printing press cylinder comprising a shaft, a pair of semi-cylindrical shells each having a supporting surface forming part of the surface of the cylinder and each of said shells having hubs through which said shaft extends, with the hubs of one shell attached to the shaft and the hubs of the'other shell free to turn thereon, and means to move the free shell around the shaft relatively to the fixed shell.

4. A printing press cylinder comprising a shaft, a pair of semi-cylindrical shells each having a. supporting surface forming part of the surface of the cylinder and each of said shells having hubs through which said shaft extends, with the hubs of one shell attached to the shaft and the hubs of the other shell free to turn thereon, and means to move the free shell around the shaft relatively to the fixed shell, said means comprising screws at opposite ends of one of said shells abutting against a portion of the other shell.

5. A printing press cylinder comprising a shaft. a pair of semi-cylindrical shells each having a supporting surface forming part of the surface ofvthe cylinder and each of saidshells having hubs through which said shaft extends, with the hubs of one shell attached to the shaft and the hubs of the other shell freei to turn thereon, and means to move the free G. A print-ing press cylinder comprising a,

pair of semi-cylindrical shells, each having a support-ing surlace of substantially the saine soA length of arc, and cach less than but nearly equal to 180, sheet-holdingfjmeans on each shell and atadjacent ends of said supporting ment of said body member out of alignment',

with the axis of the cylinder. ,e

8. A printing press cylinder ha 'ing a sheet-.supporting segment with a lgroove at the front edge of the segment and beneath the sheet supporting surface of said segment,

a bodymember in saidgroove, means to grip the edge of a sheet to said body member, and means to move said body member in said groove longitudinally of the cylinder axis.

9. A printing press cylinder having a sheet supporting segment with a groove at the front edge of the segment and beneath the sheet supporting surface of said segment, a body member in said groove, means to grip the edge of a sheet to said body member, means to move said body member in said groove substantially circumferentially of the cylinder, and means to move said body member longitudinally of the cylinder axis.

10. A printing press cylinder having a sheet supporting segment comprising a relatively long fixed portion and a relatively short removable port-ion, sheet-holding means on said removable portion, and means to hold said removable port-ion in position in the cylinder, said last-named means including a member attached to the fixed portion and extending over a projection on said removable portion.

11. A printing press cylinden having a sheet supporting segment comprising a relatively long ixed portion and a relatively short removable portion, said removable portion being positioned in a recess formed at one end of said iixed portion, sheet-holding means on said removable portion, and means to hold said removable portion in said recess.

12. A printing press cylinder having a sheet supportingr segment comprising a relatively long fixed portion and a relatively short removable portion, said removable portion being positioned in a recess formedat one end of said fixed portion, sheet-holding means on said removable portion, and means to hold said removable portion in said recess, said last-named means including a plate attached to said fixed portion beneath said removable portion and extending over a projection on said removable portion,

Lvsoaaa 18. A printing press` cylinder having a sheet supporting segment comprising a relatively long fixed portion and a relatively short removable portion, said removable portion being positioned ina-recess formed at one end of said fixed portion, sheet-holding means on said removable portion, and means to hold said removable portion in said recess, said last-namedmeans including a plate attached to said fixed portion beneath saidre-,

movable portion vand extending over a projection on said removable portion, said removable portion and its recess and said means tti-hold said removable portion in said hold said removable portion in said recess,

said last-named means including a plate attached to said ixfed portion beneath said removable port-ion and extending over a projection on said removable portion, said removable portion and its recess and said means to hold said removable portion in said recess being constructed and arranged to permit said removable portion to be moved longitudinally of the axis ot the cylinder while the removable portion is held against radial movement, and means to move said removable portion longitudinally of the axis of the cylinder and to hold it in adjusted position.

15. A printing press cylinder having a sheet supportinfr segment comprising a relatively long fixed portion with a rectangular -recess'at one end and a relatively short removable portion in said recess with one side and the bottom of said removable portion titted to the side and bottom respectively of said recess, sheet-holding means on said removable portion and a holding platev removably connected to the front of said fixed portion and beneath said recess and extending over a portion of said removable portion to hold it in said recess.

16. A printing press cylinder having a sheet supporting segment comprising a relatively long fixed port-ion with a rectangular recess at one end and a relatively short removable portion in said recess With one side and the bottom of said removable portion iitted to the side and bottoni respectively of said recesssheetliolding means on said removable portion and a holding plate removably connected to the front of said fixed portion and beneath said recess and extending over a portion of said removable portion to hold it in said recess, and means to move said removable portion longitudinally of the axis of the cylinder while said holding plate retains said removablemember in said recess.`

17.4 A printing press cylinder having a sheet supporting; segment comprising a relatively long xcd portion with a rectangular recess at one end and a relatively short removable portionin said recess With one side and the bottom of said removable portion tted to the side and bottom respectively of said recess, sheetholding means on said removable portion and a holding plate removably connected to the front of said xed portion and beneath said recess and extending over a portion of said removable portion to hold4 it in said recess, said. sheet-holding means comprising a body member positioned in a groove in said removable portion and beneath the cylindrical surface thereof, and means to clamp the edge of a sheet against said body member.

18. A printing press cylinder having sheet supporting segments With facing grooves at the front edges of the segments and beneath the sheet supporting surfaces thereof, a body member in each groove, independent means to grip the edge of a sheet to each of said body members, and means to'move one of said body members in its groove substantially circumferentially of the cylinder.

ANTHONY S. BUSK. 

